[R] Strange labels on plot with dates

From: Henrik Andersson <han_at_dmi.dk>
Date: Tue 03 Apr 2007 - 13:24:49 GMT


Hello fellow R people,

I don't understand the default behavior of the axis labeling when plotting dates.

I would expect something like 2001, 2002 or possibly Jan 01, Jan 02...Jan 06, but instead I only see Jan 01, Jan 01, Jan 01....

See the following example

startdate <- strptime("2001-01-01",format="%Y-%m-%d") enddate <- strptime("2006-12-31",format="%Y-%m-%d") dates <- seq(startdate,enddate,by="month")

daynr <- as.numeric(julian(dates,origin=dates[1]))

yvar <- sin(daynr*2*pi/365)

plot(yvar~dates,type='l')

Cheers, Henrik

-- 
Henrik Andersson

Danish Meteorological Institute
Lyngbyvej 100
2100 Copenhagen 
Denmark
Tel: +45 39157215 
Email: han@dmi.dk

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Received on Tue Apr 03 23:40:09 2007

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